.do_hide{
    display: none;
}

.main-wrapper .page-wrapper .content #topC .my_msg{
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    margin: auto;
    z-index: 10;
    width: 300px;
    height: 100px;
    color: red;
    font-weight: bold;
}